Taxonomy Online - Carboniferous spores part I - Species details

Species nameEndosporites zonalis (Loose) Knox, 1950

Description
Radial, trilete, camerate miospores. Amb of body and saccus circular to rounded triangular. Trilete mark distinct, sutures straight, extending to or almost to margin of inner body, accompanied by elevated flexuous folds of the exoexine which extend, decreasing in height, almost to the equatorial margin of the exoexinal body. Ends of elevated exoexinal folds connected laterally with narrow, fine, curvatural ridges that in proximo-distal compression are located, for much of their length coincident with the equatorial margin of the saccus, the exception being in the radial positions where minor invagination takes place. Intexine thinner than exoexine, forms inner body that may possess peripheral taper-point compression folds, indicating significant separation of the two exine layers. Exoexine thin, granulate with fine narrow limbus, forms saccus and is commonly extensively folded.